Placer-separator.



D. J. FORBES.

PLACER. SEPARATOB.

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Patented Nov. 15, 1910.

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I To all whom it may concern:

UNITED STATES Parnu" oFFrCE.-

bobigny J. romans, orroRrLANn, oREGoN, As'srGNoR To THE HYDRAULIC GRAVITY sEPABAToR co., or PORTLAND, OREGON.

PLACER-SEPARATOR.

Specification of Letters Patent.

Application filed July 7, 1908. Serial No. 442,378.

Be it known that I, DUDLEY J. Forums, a citizen of the United States, residing at Portland, in the county of Multnomah and State of Oregon, have invented certain new and useful Improvements in Placer-Separators,of which the following is a specifica tion.

' ticularly pointed out in the appended claims,

it being understood that changes in the specitic structure shown and described may be made within the scope of the claims without departing from the spirit of the invention. Y

In the drawings forming a part of this specification, and in which like numerals of reference indicate similar parts in the several views, Figure l is a sectional elevation with parts broken away of a separator embodying my invention. Fig. 2 is a top view'. Fig. 3 shows a top view of the lifting pump, Fig. 4 is a section on line A-B of Fig. 3. Fig. 5 shows a detail view in horizontal section through the upper pump.

In carrying out the aim of my invention, I employ a preferably square over-flow tank 18, carried by means of suitable supporting sills 21. This tank has a central opening within Vwhich is held the cylindrical drum l, the upper open end of which extends above the upper edge of the over-flow tank 18. This drum 18 has a conical bottom or settling chamber ycarrying the nipple 32, to which is secured an ordinary valve 31 havin two branches, one receiving the vertica ly disposed settling pipev 30, and the other the horizontall disposed water supply pipe 27. Connecte to the settling pipe 30 by means of a tee is the valve 33, while extending from the tee is the water supply pipe 29, this pipe by means of an elbow, pipe 2G and a tee being secured to the' supply pipe 27. Secured to the lower end of the pipe 30 is the slotte( extension 34 within which is held the glass settling tube 35 which is visible through the slot 36 within this lower pipe section 34. The tube 35 is snugly held within the slotted pipe 34 and is retained by means of the cap 37. Extending from 'the over-flow tank 18 isthe drain pipe 22. Entering the drum 1 from above are two or more feed pipes 15 shown in Fig. 2, which vertically enter `the drum and have their lower ends so bent as to empty tangentially within the conical bottom of the drum.

Held centrally within the drum is an open ended cylinder 2; the upper end of this cylinder is approximately on a line with the top ofy the drum while the lower edge of this cylinder ends at the upper edge of the conical bottom oi the drum as shown. At its lower end this open ended cylinder is held to the drum by means ofthe supporting bars 4. At its upper end this drum 2 is provided with a plurality of escape openings from which extend the escape pipes 17 which pass through the drum and empty into the over-dow tank 18. These escape pipes 17 support the cylinder at the upper end.

Supported by means of the sills 10, is the pump casing 14 which is of a diameter slightly smaller than the diameter of the open ended cylinder and is held squarely above this cylinder as is shown in Fig. 1. Extending from this pump casing is a tube 3 which ends a suitabledistance above the lower end of the cylinder 2 and at its lower end carries the bell 9, the lower largest end of which is of a diameter less than the inner diameter of the cylinder 2, this bell ending with the cylinder.

Held within the pump casing 14, is the pump head 13 which is carried upon the operating shaft 5,whichis continued through the pump casing, the pump head 13, the tube 3, and below extends beyond the bell 9. Secured to the lower end of this driving shaft 5, is a.

frusto-conical lifting head the lower smallerk end of this lifting pumpl being positioned squarely above the settling tube 30. T he bottom of this lifting ump is provided with a plurality of radial y extending slots 7,

shown, the bottom of this lifting pump isof a greater diameter than the cylinder 2. The top of this lifting pump 6 is held proximately to the lower end of the cylinder 2 there being a slight escape opening between the cylinder and lifting pump as clearly disclosed in Fig. 1.

Extending from the tube 3 and passing through the cylinder Q and drum 1, is the l i outlet pipe 23 this pipe extending from near the upper end o1 said tube and being provided with an ordinary valve Qi. By extendingthe pump beyond the cylinder horii zontally the former serves as a deiiector Vhelping to keep the concentrates from the overflow.

The operation of my device is very Simple.

The crushed ore is fed into the drum through i the feed pipes 15. At the same time'the 'valve 31 will have been opened permitting an inrush of water through the supply pi es "#25 'and 27 'to Hood the drrnum, as well as Ithe 'cylinder and tube 3. The. upward force of the water tends to separate the lighter particles 'of placer from the heavier and more valuable particles which glide into thejsetr -timg pipe.

causes the pump bead 13 to rotate as well as l operating the lifting `pump so that the material within the drum is being continually agitated. The pump 13`is a suction pump which draws tie water upward and discharges through the escape pipe 19 which is provided with a controlling valve .20 as shown. A certain amount of refuse is raised and carried upward within the cylinder 2 and finds an escape through the pipe 17 into the Aover-flow tank. The separator is simple and comparatively mexpensive in construction, and both durable and eiicient in operation.

Having thus described my said invention what I claim as new and desire to secure by United States Letters Patent is:

1. The herein described separator, coml -prising the 'combination with an ove'riio'w tank, of a d'rain pipe extending from said tank, drum carried by said tank and extending above said tank having a conical bottom, 'a settling pipe extending from the bottom of said drum, a water supply pipe communicating with said settling pipe, a feed pipe entering said drum and entering tangentially within said bottom, an open' -ih'g positioned above said cylinder, a tube extending from s'aid pump casing 'and held- 4within s'id cylinder, a bell extending from 'said tube and ending in alinement with said The rotation of the shaft 5 l l cylinder, s rotary 'pump head 'within said i, casing, a driving shaft extending througn held downwardly extending agitating blades within said slots, an outlet pipe extending from the upper end of said tube, and an escape pipe' extending from said pump casing.

2. The herein described separator comprising a drum having a conical bottom, a settling tube extending from said bottom, means for supplying water to said settling i tube, a discharge pipe entering said drum, an over-dow tank secured to the upper end of said drum, an open ended cylinder within said drum, escape pipes extending from said i cylinder and emptying into said over-flow i tank, a pump head above said cylinder, a tube extending from said pump head and ending above said settling pipe, and a lifting i pump at the lower end of said cylinder and communicating with said tube all arranged substantially as and for the purpose set l forth. 3. The herein described separator comprising a drum, a settling tu e extending from said drum, means for supplying water to said sett-ling tube, a discharge pipe 'entering said drum, an overflow tank secured to 1 the upper end of said drum, an open ended i l into said overflow tank, a pump head above said cylinder, a tube extending from said l pump hea'd and ending above said settling pipe, a lifting pump at the` lower end of said i cylinder and communicating with said tube, l and a discharge pipe extending from said l tube. Y

4. The herein described separator comprising n drum, a settling tube 'extending from said drum, means for supplying water to said settling tube, adischarge pipe entering i said drum, an overow tank secured to the upper end of said drum, an open ended tube within said drum, an escape pipe extending from said drum, a pump secured to the upper end of said tube, a pump secured to the lower end of said tube, and means to simultaneously operate said two pumps.

5. A device of the character described consisting of a drum, a settling chamber forming the lower end of said drum, a cylinder within the latter and having overiow outlets and a lower opened end, a tube within the cylinder, a liftingy pump located within the lower portion of the drum and below the cylinder and delivering to the tube, said pump being formed to extend horizontally beyond the o 'en end of the cylinder and substantially c osi'ng said cylinder except for the annular slit formed by slightly spacing emes/l .the pump from the cylinder", sind means for open ended cylinder within said drum, an

open ended tube within said cylinder, a shaft extending through said tube2 u pump at the lower end of said shaft proximal to Suid cylinder, a second pump nt the upper end of said shaft proximal to said cylinder, means for simultaneously operating Suid pumps :1nd n discharge pipe entering said drum.

7. The herein described separator comprising a drum, the lower portion of which forms a settling chamber, n cylinder located within said drum und haring overflow outlets at the top and an open end, a tube within the cylinder, a lifting pump delivering to the tube positioned slightly below the lower open end of the cylinder and closing the same except for the narrow annular space between the end of the cylinder and the pump, und means for directing ore within the drum and below said lifting pump,

8. The combination with a drum having a settling chamber at the lower end thereof, of :in open ended cylinder within said drum, means for supplying water to said drum, u tube within said cylinder having an enlarged flared end partly inclosing' the lower end of Suid cylinder, aslmft passing through said tube, a pump head secured to the lower end of said shaft and communicating with said cylinder und tube, esc-.ipe pipes extending from said tube, escape pipes extending from said cylinder, und u pump :it the upper end of said sli-aft connnunicutingr with said tube.

In testimony whereof I alix my signature, in presence of two witnesses.

DUDLEY J. FORBES. lVitnesses:

A. J. MATTER, PETER C. LAsssEN.Y 

